Food webs show the many different feeding relationships between organisms, and show how species depend on each other for sustenance in an intricate balance. In a river food web, carbon usually comes ...

A study found flatheads occupy the highest level in the food web, forcing native species like smallmouth bass to change their diets. The invasive catfish are growing much faster and larger in the ...

Flathead catfish are rapidly reshaping the Susquehanna River’s ecosystem. Once introduced, these voracious predators climbed to the top of the food chain, forcing native fish like channel catfish and ...